Igwitiosr-timek



E. BJACOBSON. IGNITION TIMER.

APPLICATION FILED FEB. 19, l9l9.

Patented Dec. 16, 1919.

11v VENTOR, 0 AMW fiejmwasam A TTO Y WITNESSES W 221,, MCMU uivrrunSTATES PATENT OFFICE;

EDWARD B. JACOBSON, OF PITTSFIELD, MASSACHUSETTS, ASSIGNOR TO 3' AND BMANU- FACTURING COMPANY, OF PITTSFIELD, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.

IGNITION-TIMER.

'Applicationfiled February 19, 1919. Serial No. 278,046.

To all whom it may concern.-

Be it known thatl, EDWARD n a citizen of the United States, residing atPittsfield, in, the county of Berkshire and tain new and usefulImprovements in Ign1-. tioneTimers, ofwhich, the xfollowlng 1s a,

State of Massachusetts, have invented cerspecification.

' structure and operr-ition ofthe wiper or contactor, which,successively establishes circuit with,. the provision of,- improvedmeans for eled by the contractor: i I

connection with the several terminal sectors in the casing, and also, ineomblnation thereautomatically, lubricating the course trav- Referringto the accompanying drawings,

. Figure 1 is a vertical section of an ignition timer embodying mypresent invention in its.

, preferred form and operatively mounted upon acam-shaft; Fig, 2, a faceview of the same, the front portion of the housing being cut away; Fig.3, a front end view of the rotor portion; Fig. 4, a cross-sectional viewof the same; Fig. 5, a detail view of one of the valve hearings in thelubricating portion of the'rotor; and, Fig. 6, a crosssectional'viewshowinga. modified form of the lubricating portion of the rotor, theremaining or contactor portion being cut away. v l v The mechanismherein illustrated 1s designed for use 1n connect1on with a fourcylinderexplosive engine having a' geardriven cam-shaft operated by the mam en-,

gine shaft, ,but, itshouldbe understood, however, that myainvention issusceptible of application, with slight modification, to motors havingany othernumber of explosion cylinders, and maybe otherwise mounted anddriven. a a

This invention ,mayjfbe adapted to any suitable form of housing or.casing, the easing, 1 herein illustrated "being adjustably mounted onthe front of the engineghousing 2 and arranged to inclose thefrontend ofa cam-shaft 3, which .is preferably: eared to the main engine shaft (notshown,- and extends through asuitable opening 1n the.

wall of the engine housing,

The rear end of the casing 1 is open and B. Jameson,

seated in a'circular recess 4 provided-on the face of the engine houslng2, SELlCl recess being adapted to prevent eccentric displace-,

ment of the casing. Forward displacement of the casing is preventedpreferably by a spring clamp 5 removably secured at its rear end to astud or bolt 6 fixed to the wall of the engine housing 2, and engagingat its opposite end the outerextremity of the reduced forward extensionof the front of the casing, which has a central depression to receive aboss 7 provided on; the clam 5. Rotary movement of the casing for reguat-, ing the time of ignition is controlledby a lateral arm 8 exteriorlymounted on the cas ing and provided with a bearing 9 to receive acontrol-rod (not shown). 1

Within the casing 1 is an insulation ring 10 provided at regularintervals with arcu uate contacts 11, 11, which are embedded on itsinner rim and suitably, connected to se arateterminals'12, 12, etc,arranged on t e outside of the casing 1, forconnection with the primarycircuit of separate-induction coils. I

Mounted to rotate with the shaft 3 within the casing 1 is a metalliccarrier 13 in the form of a sleeve which is normally secured againstaxial movementon the shaft by a transversely arranged removable pin 14projecting through a suitable opening in the shaft and extending at oneof its ends into a slot 15 provided on the outer rim of the carrier.-The pin 14 is secured against endwise displacement by a cup washer 16fitted over the outer end of the carrier and inclos- 111g vthe exposedend of the pin 14, the reduced outer end 17 of the shaft bein proiectedthrough the cup washer 16 an suitably threaded to receive a pair ofnuts18,

19, which are employed in conjunction with a flat washer 20, carried-0nthe reduced end of the shaft and engaging the face of the cup washer, tosecure the latter in position.

The carrier 13 is provided at opposite points on its periphery withafair of fixed metallic arms 21, 22, arrang in parallel relatiomtoeach-other in the plane of the insulation ring 10., Said arms areextended --n1 ioppositedirections' toward the insulation .ring 10, andinto positions adjacent thereto,

then respective outerl ends being arcuate in outline l to aflr'ord "am;even clearance at" all points between their faces and the innerSpecification of Letters Patent. I P t t De 1 19 rim of thering 10. Oneof said arms 21 is arranged to carry at its outer end amovable "'contactor 23 for slidab'ly engaging the': in

ner rim""oi""'t'he insulation ring"10,"the outer end of the contactorbelng arcuate 1n outline to conform to the outline of the ring 10."

The contactor referablv consists of a rectangular block of steel adaptedto move lengthwise in a slotofthe same dimensions provided transw'ersely1n the outer end of the, contact-arm21 and, 15 provided ,Wltll a stem24-,extendingv rearwardly-into acorree spending-bore 25 pIOYlClGCllengthwise 1n the body ofthe contact-arm and communicating 15 witlrsaidslot at the outerrend. Said stem 1 24 has apreduced portion 26 whichextends,

j; through a suitable. opening; provided in the .rear. Lwa1l27 of thechamberformed by the bore Y25 and beyond said wall and carries on its,rear extremity in, the frear of the contactarm 21 a removable taper-pin28 driven.

through a suitable transverse opening pro- ,vided in saidreduced-portion 26, said pin,

being adapted to engage the real-face of the contact-arm at the limit offorward move-v ,mentof the ,contactor23. ,Mounted on the a The remainingarm or lubricatorr22 of the law reduced-portion 26 of thestemintl'iebore 25' is anexpansion spring 29 operating to, ,urge the contactor23 forward, lnto constant engagement with the insulation ring 10.

carrier is provided lengthwise with a central bore form ng. a well 30,communicating with the'exterior at the rear end ofithe arm and extendingwell forward into the body of the ,,arm,: the forward endof the wellcommumduced orifice 31 through thefrontwall of a thewell. V The rear endof thewell 3 is nor-,

eating with the, exterior by means lof a remalljy closed byaremovablescrew 32 .which engages a correspondmg thread provided on the.wall of the well at) this point. The well .30 is adapted to be packedwith ansuitable lubricatin substance, vsuch/as IlOIlflllid oil, .whichislntroduced' at the rear end by removing the screw 32 for the purpose,and is forced out by, centrifugal action through the orifice 31.1 inreduced quantities when the car- ,1 rier 13 is inmotion, against theinner rim -,Of.tll 8-1I1Sllllt101l ring for lubr cating the;

' path of the contactor 23. The quantity of .lubricantreleased bytheorifice 31;is;con-

I trolled preferablyby ,a needle-valve 33 ar- I"Forwardmovement-ofranged within. the well 301in=a1inement .withtheorificejand movably mounted upon suit- .i J I able bearings, in the.form of perforate disks 34, 34, arranged inzspaced parallel relation,

withintheQwell. w at the; valve, by centrifu'gal' .action, while the;carrier 13. is in 4 motion, is yieldingly opposed by an expan: 1:

.sion sprmg 35 mounted on thevalve and dis-r :posedbetween therhearings34, 34,5 the rear end of. the spring being opposed to, the face of afixed collar 36 carried on the valve stem.

spring 35 designed to exert sufficient force under normal speeds of thecarrier to prevent the valve from completely closing the orifice 31, andin suchmanner as to permit an adequate amountof lubricant to be releasedfor maintaining proper lubrication of the traveled surface of theinsulation ring 10 and contacts 12, 12,- etc. The given posltion of thedisk bearings 34, 34, within the well is preferably maintained byremovable spacing rings 87 38, engaging the side walls of the well;

In the modified form of the lubricating portion of the rotor, ilhstrated in Fig; 6, I have provided a hollow plunger 39movably mounted inthe well 30 and having a reduced jforward extension 40 arranged toproject through a suitable opening in the front wall I of the arm 22,saidplunger and extension beng provided withan absorbent core 41 of feltor, other suitable material adapted to distribute the lubricant placedin the well upon thehtraveled surface of the ring 10, said plungerertension 40 being arranged to move forward nto engagement therewithunder the forceexerted by an expansion spring 42 withinthe-well.

Ic1aim:. H 1. In an ignitiontimer," the combination ,witha casing andcontact-elements mounted in the casing, ofa rotary portion mounted toqmove inithercasing and including a carrier, an arm provided on thecarrienfor successively establishingcontact with the contact-,elements,,and a separate arm provided on the.carrier for carrying alubricant and for ,jdistributing the lubricant on the contactelements;

a 2.11:; an ignition timer, thecombination with a casing andcontactelementsmounted in the casing, of a rotary portion mounted with acasing and contact-elementsmounted inthc .casing,.ofa rotary portionmounted to move In the casing and Including-a carrler, and 'a pair ofarms earned on the carrier, a sprmg-pressedcontact carriedby one ,ofthearms. and adapted to success-ively contact with the;contact-elen,1entsin the casing, fand; the'other vof'tthc arms having means for.ca'rrying-and distributinga lubricanton said contact eleme ntsr 1r .1:.p

.;E4. ,In an ignition timger, the combination with a casingand;contactqelements mounted in the casing; refa rotary portion mounted toinove in the casing and comprising a carrier; a pair of arms rovided onthe carrier into-the chamber for introducing the lubri- 10 cant, and aseparate opening communicating from the chamber with the exterior in thedirection of the contact-elements; and a valve Within the chamber forregulating the flow of the lubricant through said last-describedopening. v 15 In testimony whereof I hereunto aifix my signature in thepresence of two Witnesses.

EDWARD B. J AGOBSON.

Witnesses JNO. J. Wl-IITTLESEY,

LE Roy E. SHAW.

